Improvement in sewing-machines



3 Sheets-Shet 1.

,A. B. WILSON.

Sewing Machine.

No. 7,776. Patented Nov. 12, 1850.

3 Sheets-Sheet 2. A. 8. WILSON.

Sewing Machine.

Patented Nov. 12 1850.

. 3 Sheets-Sheet 3. A. 8. WILSON.

Sewing Machine.

Patented Noy. 12, 1850.

' machili e.

, 'ingsB'B,

UNITED STATES PATENT OFFICE.

A B. VVILSON', OF PITTSFIELD, MASSACHUSETTS.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 7,776, dated Nm'mnln-r1'3, 1 50.

useful Improvements in a Machine for Sewing Cloth and otherFnhrics; andI do hereby declare thatthe followiiig is a full, clear, andexinletdescri ption' of the same, reference being I the accompanyingdrawings, forming par 0! thisspecificatiom in which-.' I

' V Figure 1 isa view of thenpper side vofthe ma.-

' chine, taken in an oblique direction. ,Z'Fi g. 2 is an inverted'planview of the under side of the Fig. 3 is a section taken-through thecenter of the plate, leaving 'theiworkihg parts of the machine entire.Fig. 4is a. detached viewof the motion for operating the needle;

" similar'lettexs of reference indicate con-e j spending parts in eachof the several figures. t The nature of my improvements, which are 7applipableto a. machine in which two threads are used--viz.', one passedthrough the cloth by a needle, leaving a loop through which anotherthread-is passed by a; shuttle-consists,

fired-in an improvedmode'of operating the vibrating arm {which ,carricsthe needle; secondly,-in an improved mode of operating the shuttle, bywhich'lican passe. thread during each of its motions, 'oneduring'its'motion in one dircc tion and anothclrduring its motion intheopposite direction; and, thirdly, in an improved mode of holding dudmoving the cloth to be stitched. 1 V g I v To enable others skilled inthe art to make and use my invention, I will proceed to descrihe itsconstruction and operation.

A is a. plate of metal, of suitable form and strength, provided on itsunder side with bearwhich may be cast with it. U is the driving-shaft,which is mountedin the bearings B B and carries a small fly-wheel,

E is Ii circular disk of metal attached to or cast with the fly-wheell).

c e are small studs or pins inserted in the face of thedisk E, on thesame diameter and at equal distances from the center or axis of theshaft 1 is a shalt or spindle mounted in bearings G G, secured to theupper side of the plate A.

3 H is the needlenrin, which is attached to the end of the shaft F, andis provided near its end with an eye.

l and J are n. pan 1' of curved levers secured on the shaft F, formingan cscnpcn lent motion, and

are actuated by the studs 0 c on the disk E, for the purpose-ofoperating the noodle-arm H.

h is the needle, which is curved in the form of an arc of which the axisof the shaft F is the center. It is slightly grooved on its frontside'to guide the thread, and is provided near its point with an eye,throughwhich the thread passes. It is secured in the needle-arm by aset-screw. p

i is a. spring attached to' the upper or back side of thellfiedlcitl'lll l-[, and provided near its end with an eye, which formsan elastic guide for the thread as it passes to the needle. 1

K is a spool carrying the nccdle-th'iezul. It tnrns casily on a.spindle, It, attached ton pillar above the bearing (2 ol' the shalt l.

j is a. prcsscr-gnidc for keeping the three tight in its passage to theneedle. I

N is the shuttle, which is of metal, pointed at each end and provided oneach side with n groove. I

n is the bobbin.

m is the thread-guide.

L is it slot in thcplate A, forming the shuttlc path.

M M are two plates cl" steel, screwed to the under side of the plate A,and having their edges proj ecting slightlyovcrtlicshuttleputh, so as tofit the grooves in the shuttle nnd form guides for it. The plate M isprovided near the middle of its edge with notches, into which theneedle-thread falls while the loop is being filled, so as to prevent thethread being cut by the edge of the plate. v

Ods the shuttle-driver, which consists of a dot lever vibrating on a.fixed center, I, on a. line with the center of the needle, at right {itgles to the shaft F, having forked arms 0 o the ends of which arerounded, so as to fit sligh indentations in the back side of theshuttle. The shuttle-path L is in the form of an arc of which 1 is thecenter.

P is a cam-barrel 0n the main shaft.

11 is a pin or stud on the under side of the shuttle-driver O, fittingeasily in an eccentric groove in thecum-barrel l, which groove is of therequired form to give inotionin one diof the shaft. Cbeing continued,the operation- 2. lhe combinzveion of the sliding bar Q, the

of t-hc machine will proceed. plate 7", the feeding plai'e V the spring\V, he \Vhat Iclaim as m'yinvent-ion, and desireto screw 2, the lever Rand the clznnpirayqdate secure by Let-tors Patent, is T, for holding andfeeding the cloth to the new 1. Forming ast-it-ch by each throw of the(110 and regulating" the length ofilhe stitch, in shuttle andcorresponding motion of the necthe manner herein described, or in anyway dle-t-hat; is to say, making one stitch at. each I substantially theSan). forward and another at each backward motion I of theshuttlethis.being eiTected by the nee-- dle in combination with theshuttle, both eonstrnctcd, arlmiged and operating as herein \Vifnesses:described, or in any other mode substantially V O. 1). Khan, the same.R1,. lorniu:

ALLEN 12. \nLsoNQ l e I

